{"reference": {"slug": "greubel-forsey-double-tourbillon-30", "brand": "Greubel Forsey", "ref": "DT30", "model": "Double Tourbillon 30° Édition Historique", "case_material": "Platinum", "url": "https://mostexpensivewatches.net/reference/greubel-forsey-double-tourbillon-30", "description": "The Greubel Forsey Double Tourbillon 30° Édition Historique in platinum was released in 2010 as a final 11-piece limited edition to conclude the production of the brand’s foundational Double Tourbillon 30° series. This reference features the manual-wind caliber GFM02U, characterized by a nested tourbillon system where a one-minute inner carriage inclined at 30 degrees rotates within a four-minute outer carriage. The 43.5mm platinum case houses a dial distinguished by three-dimensional gold plates engraved with the brand’s philosophy, a power reserve indicator, and a sub-seconds dial. Collectors value this reference for its role in establishing the brand’s technical identity and its limited production volume. On the secondary market, this model typically commands prices in the mid-to-high six-figure range. A notable auction result occurred in 2021 when a platinum Édition Historique sold for approximately 475,000 USD, reflecting its status among high-complication collectors."}, "listing_stats": {"count": 0, "median": 0, "low": 0, "high": 0}, "listings": [], "auction_lots": [{"slug": "greubel-double-tourbillon-30-prototype", "brand": "Greubel Forsey", "reference": "DT30", "model": "Double Tourbillon 30° Édition Historique", "case_material": "Platinum", "hammer_usd": 685000, "year_sold": 2024, "venue": "Phillips Geneva", "lot_summary": "Inner tourbillon cage inclined 30° within outer cage. Greubel's first invention. Production ~50/yr across the entire brand.", "url": "https://mostexpensivewatches.net/auctions/greubel-double-tourbillon-30-prototype"}]}